Safety device for elevators



Dec. 11, 1928. 1,694,731

J. A. CARLTON SAFETY DEVICE FOR ELEVATORS Filed Au 18. 1927 I'NVENTUR I w f 3" yes, PATENT- o FFlc- I mivxnsannxaynnn CAELTQH, on TORONTO, QNTARIO, onnAnA, essrenon TO Massey annals contra nnvirrnn. rononmo, (Janene.

SAFETY :onvrcn non jnnnvnrons.

Application filed Augnst 18, 19)}.

This invention relates to safety devices for elevators and more particularly to the type in wh ch the elevator gate is adapted to lock andunlock the elevator and the elevator is 5 adapted to lock and unlock the gate enemy object is to provide a siinple device of this character which maybe manufactured cheap-v ly andiwhich may readily be applied toi le vators now in service.

l attain my; object by means of the corn strnctionsbriefly described as follows. To the usual elevator control cable is secured a cable having a number of bars connected therein, one-for each landing or floor at which the elevator may stop. Each bar has a plurality ofslots formed therein, anyone of i which is adapted to receive an end of a spring pressed latch. Each elevator gate is provided with an arm adapted, when the gate is engagement with the bar and thus release the elei-ator control cable. Each gate arm is adapted to belocked, when the gate is closed, by another latch and these latches arcadaptedto be released by a shoe, carried on the elevator. v landing carried in a casing or box through which passes the slotted bar and in one end 01 which is received the gate arm The const actions are more any described and illustratedin the accompanying drawingin which Fig. 1 is a diagrammatic view showing the manner in which the bars are carried;

Fig. 2 a front elevation of the casing, partly broken away to show the latches;

Fig. 8 a cross section of the casing on the line 3-3 in Fig. 2;

Fig. 4 a long section on the line l l in Fi n1. 2; and I Fig. 5 a longitudinal section on the line Fin. 2.

In the drawings like numerals of reference indicate corresponding; parts in the different figures.

5 l is an elevator control cable of ordinary construction arranged in the ordinary ma ner around pulleys l and 1" for controlling the operation oi the elevator operating means (not shown). The ends of another cable 2 are securedto the first cable and in the cable 2 are connected a plurality of bars 3. These bars are located in the elevator well adjacent the landings 4:.

Each bar is PI'OVJdQd with a series of slots the latter into engagement with i the, shoul closed, to engage the latch to move it out'o't The latches located, at each ,with the arm 7 of thogate 7 at the Serial N10, 213,817

3 forming shoulders adapted to be engaged;

he latch is pivoted interme diate its ends in a casing5- and a coil springe engaging the end 3of the latch tends to rock l A 1' i CLQL S. p p Tothe*usualshding gate? at each landing issecuredan arini' The end 7" of the arn i i being adivpted, when the gate is closed, to

engage the latch end3 to'rock the latchout or engageinentovith the slots 3? The gate is norinally locked in its closed position; by means of a latch 7, adapted toengage the portion C of the arm 7. This latch is also pivoted within the casii'lg 5 and a springS engaging the end 7 0mm latchtendstorocli the latch to its operative'position. i

Thegatel'atchl" is released by a1 shoe 9 carried by the elevator 9,)the shoe being adapted to engage the latch end 7?, when the eleva or is substantially in alineinent with a landing. l

, The casing 5 is provided with slots Stand '5 through which'the spring engagingends 3 and? of the latches 8 and? project for engagement by the gatearin FF-and the ole ator shoe 9 respectively. The upper end of the casing, which is secured to wall of the elevator well, is forniied with two chain} to receive the portion 7 of the sate arm 7. i r I The latter, is provided with two bends 1ntermediate the portions 7 and 7" to form a laterally extending portion 7 which extends substantially parallel to the side walls of the casing chambers 5 and 5? and lies the space between them.

From the above description it is obvious that when the gates are closed they will be locked by the latches 7 h and that the ite arms 7 will in eye the latches 3* out of eng ,e.

ment with the bars 3. The elevator new tree and can be moved up or downby oper ating the control cable 1 in the nsual manner.- When the elevator reaches each landing the shoe 9 releases the latch 7 from engagement lanz'ling whereby that gate may be opened. It the gate be opened the arm 7 inoved out of engageinentwith the latch 53* and the spring 6 forces the latch into engagement with any one of theslots in the bar 3. This locking of any of the bars prevents the control cable from being operated until the gate is again closed.

lVhat I claim is:

1. In a device of the character described,

the combination with an elevator, an elevator mntrol cable and a gate, of a bar connected with the cable and provided with a series of shoulders; a latch adapted to engage the shoulders to releasably lock the bar; an arn'i ca ried by the gate adapted to engage the latch to move it to an inoperative position when the gate is closed; a latch adapted to engage the arm to releasably lock the gate in its closed position; a shoe carried by the elevator for moving the gate locking latch to an inoperative position when the elevator is substantially in alinement with a landing.

2. An elevator and elevator gate locking device comprising a casing; two latches pivotally carried within the casing, one being adapted to releasably lock an elevator control cable; an arm carried by an elevator gate adapted to move the cable locking latch to an inoperative position and to be releasably locked by the other latch when the gate is closed; and a shoe carried by an elevator for moving the gate locking latch to an inoperative position when the elevator is at a landing.

3. In a device of the character described the combination with an elevator, an elevator control cable and a gate, of a casing having two chambers arranged side by side in spaced relationship to one another, the sides of one chamber being cut away, the casing being provided with slots; cable and gate locking latches pivotally carried within the casing and having their upper ends received in the chambers, each latch having an end project ing through one of the slots; an arm carried by the gate adapted to engage the projecting end of the cable locking latch to move it to release the cable, the arm being bent intermediate its ends to lie in the said cut away portion of one ot the chambers for engagement by the gate locking latch; and a shoe carried by the elevator for engaging the projecting endoi the gate locking latch to release it when the elevator is at a landing.

-t. In a device of the character described the combination with an elevator, an elevator control cable and a gate. of cable and gate locking latches arranged side by side and having their latch jaws at opposite ends of the latches; an arm carried by the gate adapted to engage the cable locking latch to release the cable when the gate is closed, the gate locking latch being adapted to lock the armwhenthe arm is in its cable latch releasing position; and a shoe carried by the elevator for moving the gate locking latch to an inoperative position when the elevator is substantially in alinement with a landing.

5. In a device of the character described the combination with an elevator, an elevator control cable and a gate, of cable and gate locking latches arranged side by side and having their latch jaws at opposite ends'o'f the latches; an arm carried by the gate adapted to engage the cable locking latch to release the cable when the gate is closed, the arm being bent intermediate its ends for engagementby the gate locking latch when the arm is in its cable latch releasing position, whereby the arm is positioned behind one latch and in front of the other; and a shoe carried by the elevator for moving the gate locking latch to an inoperative position when the elevator is substantially in alinement with a la nding.

Signed at Toronto, Canada, this th day of August, 1927.

JAMES ALEXANDER CARLTON. 

